Common Name
Golden Stripes Sucker, often sold simply as a Hillstream Loach. The cf. marker means the fish closely resembles Gastromyzon praestans, yet may be an undescribed or regional form that still needs taxonomic study.
Origin and Habitat
Native to Borneo hillstreams, collected from cool, crystal-clear tributaries where water races over bedrock, rounded cobble, and coarse gravel. These shallow riffles and runs have intense, steady current, very high oxygen, and bright light that grows a thin film of algae on rock plates. Aquatic plants are scarce in the fastest lanes; shelter comes from rocks, ledges, and gaps between stones, with leaf litter settling in calmer margins.
Temperature and Water Conditions
Aim for cool to mid-tropical temperatures, typically between 20°C and 24°C. The water should be well-oxygenated with a strong current. A pH range of 6.0 to 7.0 and soft to moderately hard water (dGH 3–8) is ideal. Regular water changes and a clean, flowing system are essential.
Behavior and Compatibility
Active and social, these loaches prefer groups of at least six. They are peaceful and thrive in well-structured tanks with plenty of hiding spots. Avoid keeping with overly aggressive or fast-swimming species.
Feeding
Feed a varied diet of high-quality sinking pellets, frozen or live foods such as bloodworms, daphnia, and brine shrimp. Offer small meals 2–3 times daily.
| Parameter | Recommended Range |
|---|---|
| Temperature | 20°C – 24°C |
| Water pH | 6.0 – 7.0 |
| Water Hardness (dGH) | 3 – 8 |
| Flow Rate | Strong current |
| Group Size | 6 or more individuals |
FAQ
What is the difference between this loach and Gastromyzon praestans?
The ‘cf.’ designation indicates this fish closely resembles Gastromyzon praestans but may represent a regional or undescribed variant. Full taxonomic classification is still under study.
Can this loach be kept in a community tank with other fish?
Yes, as long as the tank has strong water flow and includes plenty of hiding places. It is peaceful and best kept in groups of six or more with compatible, non-aggressive species.
What kind of substrate and decorations are best for this species?
A coarse gravel or rounded cobble substrate is ideal. Include rocks, ledges, and crevices for shelter. Avoid fine sand that can be easily stirred by the current.
Diane Skinner –
Bought a group of five Golden Stripe Hillstream Loaches for my 120-liter tank. They’ve been active and healthy for over three months. The tank needs strong flow and a lot of rocks, which I’ve added. They eat well on sinking pellets and occasional frozen foods. Very active and social, they seem to enjoy the current and the rocks.
Katherine Black –
First time keeping hillstream loaches. The fish are calm and clean, and they form a nice group. I adjusted the flow and added more rock structures. They don’t like still water, so I now have a filter with strong current. Feeding is easy with a mix of pellets and bloodworms.
Nicola Hart –
The loaches are very active and seem to thrive in the cool, flowing water. I keep them in a well-maintained tank with a strong filter and plenty of rocks. They don’t eat much but stay healthy. The bright light and algae film on rocks are a nice touch.